Jordan plug body



1959- B. E. PREVOST JORDAN PLUG BODY Filed March 18. 1955 9 m0 TV WE R V P E 0 N U R B ATTORNEYS United ta tes JORDAN PLUG BODY Application March 18, 1955, Serial No. 495,192

12 Claims. (Cl. 92-27) This invention relates to Jordan engines used in the paper industry and especially to an improved Jordan plug.

The plug, or rotor, of a Jordan engine is of considerable weight and revolves at high speed whereby it is subject to great stress and must be able to withstand the same. In the past, Jordan plugs have been assemblies of cast metal such as in U. S. Patent 2,309,376 to Avery of January 26, 1943 and U. S. Patent 2,009,985 to Bray of July 30, 1935. More recently it has been proposed to assemble such plugs from sheet material as in U. S. Patent 2,610,554 to Stuck of September 16, 1952 to achieve lighter weight. The truncated conical portion of such plugs has usually bridged the entire space between end closure hubs or discs, or as taught in the above mentioned Avery patent half such space with no inside support whatever. Such plugs are usually grooved or slotted to retain the plug knives and upon breakage of a slot, the truncated conical portion of the plug must be heated for reslotting or repair. Because of the excessive longitudinal span the truncated conical portion tends to sag upon heating, thereby rendering the plug unusable thereafter.

The object of this invention is to provide a Jordan plug wherein the truncated conical portion or shell is supported for its full length by spoke-like webs located at spaced angular distances around the axis to prevent such sagging upon repair thereof.

Another object of the invention is to provide a Jordan plug wherein the shell is supported by axial full length and radial substantially full length webs which in turn are supported by the end closure elements of the plug.

A further object of the invention is to provide a Jordan plug having a shell supported full length by axially extending webs which form elongated compartments, of substantially sector-shape cross section all connected with the plug shaft openings in the end closure elements. No sealed compartments are thus formed and every exposed inside and outside face of the plug can be reached by coating material.

Still another object of the invention is to provide a Jordan plug having such elongated full length compartments with the compartments connected to each other, proximate the shell, for facilitating the circulation of any stock seeping thereinto by eliminating dead-end isolated pockets.

A still further object of the invention is to provide a grooved Jordan plug having full axial length, substantially full radial length supporting webs capable of being easily coated both inside and outside with an electrically negative corrosive resistant coating whereby the life of the plug is extended while the cost of manufacture is reduced.

Other objects and advantages of the invention will be apparent from the claims, the description of the drawing and from the drawing in which Fig. l is a side view in section of a plug constructed in accordance with the invention.

Fig. 2 is a view in section on line 2-2 of Fig. l.

atent Q Fig. 3 is a perspective view of the plug and Fig. 4 is a view similar to Fig. 1, on a reduced scale showing the plug of this invention mounted on a plug shaft.

In the drawing, 20 is a Jordan plug constructed in accordance with this invention. Plug 20 is formed by a unitary hollow body 21 having means thereon for supporting a plurality of plug bars or knives such as shown at 22 in Fig. 4. The body 21 includes a truncated conical shell 23 formed of sheet metal such as stainless steel and of uniform thickness. Preferably shell 23 is formed of two identical halves 24 and 25 welded along longitudinally extending, oppositely disposed seams 26 and 27. The small end portion of shell 23 is desig nated 28 and the large end portion thereof is designated 29. After assembly of the plug 20 the outside face 30 of shell 23 is longitudinally grooved to form knife retaining slots such as 31 for the knives 22 in the usual manner.

A pair of spaced apart end closure elements 35 and 36 are provided each including a flat disc such as 37 and 38 having a circular peripheral rim portion such as 39 and 40. Each element 35 and 36 also includes a cen-' tral opening 41 or 42 therein for receiving a plug shaft 43 therein with a drive fit which assures the sealing of the opening. Preferably each element 35 and 36 also includes a sleeve such as 44 or 45 with the openings 41 and 42 forming axial bores therein. The discs 37 and 38 are each welded as at 46, 47, to the outer end of a sleeve 44 or 45 and the end portions 28 and 29 of shell 23 are each welded as at 48 and 49 to a rim portion such as 39 or 40.

A plurality, and preferably at least six, shell supporting axially extending members are provided in this invention for offering full length support to the shell 23 from the inside thereof. The shell supporting members are designated 55, 56, 57, 58, 59 and 60 and are spaced apart at equal angular distances around the longitudinal axis of plug body 21. The maximum span bridged by shell 23 is thus an angular distance of sixty degrees and experience has taught that such a short span will prevent sagging of the shell when the plug is heated for repair.

Each member, or full length web, such as 56 includes an outside, longitudinal edge 61 in contact with the adjacent portion 62 of the inside face 63 of shell 23 from one end to the other. The inside longitudinal edges such as 64- of each member such as 56, parallel the axis of body 21 and outline a cylinder of slightly greater diameter than the diameter of the shaft openings 41 and 42. The members 56 thus extend full length axially of body 21 and substantially full length radially of body 21 in a spoke-like manner to form compartments of substantially sector-like shape in cross section. The shell supporting members thereforedo not engage the plug shaft such as 43 and have a definite clearance therefrom. Each member such as 56 is cut away at 65 at the large end of the body and at 66 at the small end of the body to fit around the sleeves 44 and 45; The sleeves therefore form a shelf as at 67 and 68 to support the members 56 with the members in turn supporting shell 23. Each member such as 56 is preferably welded as at 70 to an outside face 71 of the sleeve 44 and at 72 to an outside face '73 of the sleeve 45. Preferably there is no weld between the forward and rear edges of the shell supporting members and the end closure elements, but there is a full length weld 74 between the outside longitudinal edges 61 and the inside face portions 63 of shell 23.

At least one opening such as 75 or 76 is provided in each member such as 56 to prevent the longitudinal compartments such as 77, formed between adjacent axial members from trapping any liquid seeping into the plug. The compartments thus communicate with each other around the plug and liquid settling in a compartment cannot unbalance the plug.

It should be noted that the seams 26 and 27 of shell 23 are positioned on two opposite axial members such as 55 and 58 to provide strength at the seams. After assembly of the plug body with its end closure elements and axial shell supporting members, the grooves or slots 31 are formed in the outside face 30. Before drive fitting the plug body onto the shaft 43 and before inserting the plug knives 22 with their separators the entire plug body is coated with a corrosive resistant or repellent coating 80. With the plug construction of this invention there are no closed, or isolated, pockets inside the body and the entire plug body can be dipped into the liquid coating material or sprayed therewith. Thus, in the preferred form of plug every exposed inside and outside face of the body, including the faces of the grooves or slots, bears a coating or layer 80 of anti-corrosive material.

Preferably the coating applied is electrically negative in order that it will repel the negative corrosive electrons to which it will be exposed in use. A satisfactory coating for this purpose is described in U. S. Patent 2,478,954 to Tuttle of August 16, 1949, and sold under the trademark Endurion by the Rust-Proofing and Metal Finishing Corporation. It is applied by a single dip, chemical immersion process that reacts on a phosphated ferrous metal surface to form a complex compound, integral with the metal which is more dense and corrosion resistant than the base phosphate.

After the body 21 has received the corrosive resistant coating 80, the knives 22 are inserted in the slots 31, the separators are inserted between the knives all in the usual manner and the shaft 43 is then driven into the shaft openings 41 and 42 under a pressure of about fifty tons, to effectively seal the hollow interior of plug body 21. After much use, if paper stock or other liquid seeps into the interior of the plug 20 the anti-corrosive coating protects the interior and the connected compartments therein keep such liquid continuously circulating rather than tending to settle in a particular location.

I claim:

1. A unitary, hollow, Jordan plug body for supporting plug bars, said body comprising a truncated conical shell of sheet material having longitudinally extending exterior grooves therealong for retaining plug bars; a pair of spaced apart end closure elements each comprising a single flat disc permanently joined and sealed at its outer rim portion to one of the opposite ends of said shell and each element having a central inwardly projecting sleeve with an axial bore therein for a plug shaft, and a plurality of shell supporting axial members of sheet material angularly spaced around the longitudinal axis of said body, and each extending longitudinally the full length of the space between said discs, each opposite end por tion of each said member being joined to and supported on the sleeve of one of said elements, each member having its outer longitudinal edge joined to, and in supporting engagement with, the full length of the adjacent portion of the inside face of said shell and each member extending radially from. the plane of said shell to proximate the plane of the bores in said sleeves.

2. A combination as specified in claim 1 wherein the inner longitudinal edges of said axial members outline a cylinder of slightly greater diameter than the diameter of the axial bores of said sleeves.

3. A combination as specified in claim 1 wherein said shell is formed of two halves joined along oppositely disposed, longitudinally extending seams and said seams are positioned along the outer edges of a pair of opposite axial members whereby said seams are supported full length against sagging.

4. A combination as specified in claim 1 wherein six such shell supporting, axial members are provided and the greatest span bridged by said shell is an angular distance of sixty degrees.

5. A combination as specified in claim 1 wherein said shell, discs, sleeves and axial members are joined by welds and all of the exposed interior and exterior faces of said shell, grooves, discs, sleeves, axial members and welds are entirely covered with an overlying layer of protective substance.

6. A combination as specified in claim 5 plus a plug shaft drive fitted into the axial bores of said sleeves to seal the same, and the inside of said hollow body, against the admission of liquid.

7. A hollow, unitary Jordan plug body for supporting plug bars, said plug body comprising a pair of spaced apart circular end closure discs of different diameters, each having a shaft opening therethrough, a frustro-conical shell enclosing the space between said discs, said shell bein joined at each opposite end to the circumferential portion of said discs and having means for retaining plug bars therearound, and at least six, longitudinally extending members within said plug, angularly spaced around the axis thereof, each joined at each opposite end to, and supported, by one of said discs and supporting at its outer edge the inside face of said shell, said members extending radially inwardly from the plane of said shell to the plane of said shaft openings and forming full length compartments connecting with the shaft openings in said discs.

8. A combination as specified in claim 7 wherein each said member includes at least one opening therein, proximate the outer edge thereof, for connecting said compartments thereby eliminating isolated pockets in said plug body.

9. A hollow, unitary, Jordan plug body comprising a pair of spaced apart circular end closure elements of different diameters each including an inwardly projecting sleeve portion adapted to fit around a plug shaft; a truncated, conical shell of sheet material enclosing the space between said elements and joined at each opposite end to the outside rim portion of one of said elements and at least six axial webs of sheet material, angularly spaced around the longitudinal axis of said body and extending longitudinally the full length of the space between said elements, each said web being joined to, and supported on, one of said sleeves at each opposite end of its inside longitudinal edge and being joined to, and in supporting engagement with the inside face of said shell along its outer longitudinal edge.

10. The method of making a sealed, corrosive resistant Jordan engine plug which comprises the steps of forming a truncated conical, hollow compartmented plug 1 body of sheet material having openings only at each end for receiving a plug shaft and having all compartments therewithin connecting with said openings; then grooving the exterior tapered surface of said plug body for receiving plug knives; then coating all of the exterior surfaces of said body including said grooves and coating all of the inside surfaces of all of the compartments within said body, with a corrosive resistant layer; then inserting a plug shaft in the openings of said body and sealing said openings against the admission of liquid and then inserting the plug knives in said grooves.

11. A method as specified in claim 10 wherein said coating step is performed by dipping the entire plug body in a bath of liquid coating material, after said grooving step and before said shaft insertion step.

12. A method as specified in claim 10 wherein the steps of inserting said plug shaft in the openings and the sealing of said openings are accomplished by forcing said shaft into said openings with a pressure of about fifty tons per square inch.

References Qited in the file of this patent UNITED STATES PATENTS (Other references on following page) UNITED STATES PATENTS 2,478,954 Tuttle et a1 Aug. 16, 1949 1,362,219 Bidwell Dec. 14, 1920 gggggg 313 2 13;? 1,378,167 Clark May 17, 1921 1,479,382 Hanks et a1. Jan. 1, 1924 5 FOREIGN PATENTS 1,971,335 Benner et a1. Aug. 28, 193 1 12,563 Great Britain of 1896 2,208,316 Baxter July 16, 1940 27,764 Great Britain of 1903 

